US 2025/0060548 A1 · FLAME RETARDANT OPTICAL FIBER CABLE HAVING A FOAMED CABLE JACKET AND METHOD OF MAKING SAME

Abstract

Embodiments of a low-smoke, zero halogen (LSZH) composition for forming a foamed cable jacket are provided. The LSZH composition includes a polymer component, and an LSZH flame retardant package dispersed in the polymer component. The LSZH composition further includes a chemical foaming agent that is present in an amount up to 5% by weight of the LSZH composition and a melt strength enhancer that is present in an amount up to 1% by weight of the LSZH composition. Also provided are embodiments of an optical fiber cable having a cable jacket surrounding a cable core. The cable jacket is made from the LSZH composition, which has a first density. The cable jacket has a foamed region with a second density that is 50% to 95% of the first density.

Claims20

Dependent claims

An optical fiber cable, comprising:

a cable jacket comprising an inner surface and an outer surface, the inner surface defining a central bore extending along a length of the optical fiber cable;
a cable core disposed within the central bore, the cable core comprising at least one optical fiber;
wherein the cable jacket comprises a low-smoke, zero-halogen (LSZH) polymer composition;
wherein the cable jacket comprises a first region that has a first density;
wherein the cable jacket comprises a second foamed region that extends a portion of a distance between the inner surface and the outer surface;
and
wherein the foamed region comprises a second density that is 50% to 95% of the first density.

4 more elements

Dependencies are inferred from the claim text.

Flame retardant optical fiber cable having a foamed cable jacket and method of making same

Life of this patent

Flame retardant optical fiber cable having a foamed cable jacket and method of making same

Life of this patent

Abstract

Claims20